﻿/**
 * Copyright (C) 2012 original author and authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace NGuice.Inject.Internal
{
    internal sealed class Initializables
    {
        /// <summary>
        /// 为一个实例获取一个Initializable实现
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="instance"></param>
        /// <returns></returns>
        internal static Initializable<T> Of<T>(T instance) 
        {
            return new InstanceInitializable<T>(instance);
        }

        private class InstanceInitializable<T> : Initializable<T>
        {
            private T instance;

            internal InstanceInitializable(T instance)
            {
                this.instance = instance;
            }

            public T Get(Errors errors)
            {
                return this.instance;
            }

            public override string ToString()
            {
                return this.instance != null ? this.instance.ToString() : "null";
            }
        }
    }
}
